<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .aaa{
            padding: 50px;
        }
        .s{
            border: 1px solid #000;
            background: blue;
            color: aliceblue;
            width: 50px;
            height: 50px;
            float: left;
            text-align: center;
            line-height: 30px;
        }
        .s1{
            font-size: 0.5em;
            line-height: 10px;
        }
    </style>
</head>
<body>
<div class="aaa">
<script>
    for (let i=0;i<19;i++){
        document.write('<div class="s">0 <div class="s1">80 + '+i+'</div></div>')
    }
</script>
</div>
</body>
</html>